Headphones



FIG. 1 is a front perspective view of headphones showing the claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines in the figures show portions of the headphones that form no part of the claimed design. 

CLAIM The ornamental design for headphones, as shown and described. 